#include<reg52.h>
#define duan P0
#define uint unsigned int

sbit w1 = P2^4;
sbit w2 = P2^5;
sbit w3 = P2^6;
sbit w4 = P2^7;


void main(void)
{
		w1 = 1;
		w2 = 0;
		w3 = 0;
		w4 = 0;
	duan = 0x7c;
	
		while (1);
}